hequn8128 commented on a change in pull request #8664: [FLINK-12779][table]
Avoid field conflicts when generate field names for non-composite
Typeinformation
URL: https://github.com/apache/flink/pull/8664#discussion_r294211616
##########
File path:
flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/typeutils/FieldInfoUtils.java
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@@ -186,6 +186,37 @@ public static boolean
isReferenceByPosition(CompositeType<?> ct, Expression[] fi
return fieldNames;
}
+ /**
+ * Returns field names for a given {@link TypeInformation}. If the
input {@link TypeInformation}
+ * is not a composite type, the result field name should not exist in
the invalidNamesForNonCompositeType.
+ *
+ * @param inputType The TypeInformation extract the field names.
+ * @param invalidNamesForNonCompositeType The invalid field names for
non-composite types.
+ * @param <A> The type of the TypeInformation.
+ * @return An array holding the field names
+ */
+ public static <A> String[] getFieldNames(TypeInformation<A> inputType,
List<String> invalidNamesForNonCompositeType) {
Review comment:
Good idea!
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